Composing room saw



May 30, 1939, F. w. sEYBoLD COMPOS ING ROOM SAW Original Filed May 2l, 1936 v @@Jw, M, mwah Patented May 30, 1939 rrso sTArss to American Type Founders Incorporated,

Elizabeth, N. .1., a corporation of New .lersey Original application May 21, 1936, Serial No. 81,069. Divided and this application March 12, 1937, Serial No. 130,605

4 Claims.

The present invention relates to metal saws and more particularly to composing room saws.

An object is to provide an improved saw assembly with means to positively position the saw axially and also means to adjust all of the trimmer knives simultaneously the same amount.

Other objects and features of novelty will be apparent from the description taken in connection with the drawing, in which,

Fig. l is a sectional elevation through the savv, driven pulley, and grinding wheel assembly;

Fig. 2 is a plan view of the two cam Washers employed in connection with adjusting the trimmer knives and saw; and

Fig. 3 is a side elevation of the saw hub.

The saw assembly includes a shaft or spindle rotatively mounted by means of the ballbearings i112 and |13 in the casing or housing lili carried by the tcp member of the pedestal. The ball-bearings |72 and |15 abut shoulders |15 and |15 respectively, on the shaft. The outer race of bearing |12 on one side abuts the shoulder |11 within the housing and on the other a shoulder |13 on the oil seal |19 secured to the end of the housing as by cap screws |8i. The outer race of bearing E13 has a slight play between shoulder |81 in the housing and the oil seal |92, thus allowing for expansion and contraction.

The driven pulley |83 is keyed to the shaft ill and has one end of its hub abutting the inner race of bearing |13. Proper running clearance is obtained by adjustment-of the nut |84 and lock washer E85, the nut being threaded on the shaft iii. The grinding wheel |96 is mounted at the right end of the shaft between the collar |81 and washer |88 being clamped between these parts by the nut E39 threaded on the end of the shaft,

The saw hub i having the saw |9| secured thereto as by the countersunk screws i9|a is threaded on the left hand end of the shaft ill by a left handed thread when viewing the saw from the left of Fig. 1. The hub ISE carries the trimmer knives is? which extend through the same, the cutting ends being located at the left as viewed in Fig. 1, the opposite or non-cutting ends abutting a nut |93 threaded on thepcollar i951 pinned to the shaft |'i i. The function of the nut E93 is to adjust all of the knives simultanecusly and a uniform amount, the knives having been ground to equal length so that each knife will perform its share of the work in the trimming operation. The nut |93 may be locked to the collar it@ by set screw |91 acting on the shoe |98.

Interposed between the hub |90 of the saw and the collar ld are two cam washers and |96. The cam or wedge washers are reversed with respect to each other and each comprises a at face |99 and a Wedge or helical face 290 formed with radial V-shaped teeth 20|. The distance between the faces |99 of the washers may be adjusted by turning one with respect to the other. After the adjustment has been made the interengagement of the teeth 20| maintains the same.

The function of these wedges is to permit the positioning of the saw blade |9| so that the trimmer knives |92 will protrude only a definite amount, say #A1 point, beyond the swaged teeth 232 of the saw, so as to keep the amount of material to be removed by the trimmer knives at a minimum. As the swaging of the teeth Wears, an increased amount of material would have t0 be removed by the trimmer knives |92, and to overcome this the circular wedges |95 and |96 may be adjusted so that the saw blade is moved toward the left as viewed in Fig. 1. Thus, the saw cut and trimmer knife cut may be adjusted for the best results.

Trimmer knives are nearly semi-cylindrical in form having a slabbed off portion providing a fiat surface 248. After the knives have been adjusted to project the proper amount, any suitable means may be provided for properly holding the cutting edge from turning. Thus, referring to Fig. 3, a knife |92 is shown in one of the apertures of the hub with which a locking means cooperates, consisting of the plug Sti? forced against the fiat or slabbed off side of the knife by the screw lidi extending in a direction parallel to a tangent to the outside surface of the hub.

Although the invention has been described in detail, it is to be understood that it is not limited to the single modification shown but includes other modifications and changes coming within the scope of the appended claims.

This application is a division of my application Serial No. 81,069,1led May 21, 1936.

Having thus described the invention, what is claimed as new and desired to be secured by Leted coliar, and trimmer knives extending axially f adapted to hold the hub at a denite axial position on the shaft, trimmer knives extending axially through said hub and means to advance al1 of the knives simultaneously the same amount.

3. The machine according to claim 2 wherein the cam faces of the washers are serrated.

4. The machine according to claim 2 wherein said means includes two Washers, the contacting adjacent faces of which are serrated and helical.

FREDERICK W. SEY'BOLD. 

